Random Drupal Failures

I've been rather frustrated with my web site lately as I've been getting random Drupal failures telling me it can't find "settings.php." Utter nonsense; the file is there, permissions are correct, and it usually finds it just fine.So, if you've been confronted with a rather odd home page or link when navigating my site, I apologize. I think I may have worked around it, but seeing how it pops up randomly, it's hard today. It's gone right now, but we'll see about tomorrow....